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Thread: Desperate Need of help

  1. #1
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    Cool Desperate Need of help

    Hi to anyone that is reading this, and thank you for taking the time to do so. I have been trying to get some code figured out and im going out of my mind.
    THE GOAL: Have a playerobject (square) and a enemyobject(square) and get a vector between them to determine if they are in line of sight of each other. (there maybe terrain objects, also square in the way). All of these objects are derived from the same "Entity" super class. (I WISH I WAS BETTER AT MATH FOR THIS) Here is my code so far, it just determines if the player is close enough to the enemy for the enemy to pay attention to him.

    I think the proper way to do this.. is to create a line between the player and enemy, get all the terrainobjects that are in bounds of the rectangle of possibles, then check the objects to see if any of thier boundries are touching the line between the player and enemy. Sadly this is beyond my skills.. can someone please help me get started. AND/Or tell me if it is possible to make a 360 degree projectile but using graphics.Drawline() with the vector line between the player and enemy.

    public void creatureShoot() {
    CreatureEntity creature;
    int xDistance, yDistance;
    int playerX, playerY, creatureX, creatureY, totalDistance;
    for (int j = 0; j < currentCreatureObj.size(); j++) {
    creature = (CreatureEntity) currentCreatureObj.get(j);
    //get coords of the center of the sprites
    playerX = (int) (playerEnt.getX() + (playerEnt.getWidth()) / 2);
    playerY = (int) (playerEnt.getY() + (playerEnt.getHeight()) / 2);
    creatureX = (int) (creature.getX() + (creature.getWidth()) / 2);
    creatureY = (int) (creature.getY() + (creature.getHeight()) / 2);

    xDistance = Math.abs(playerX - creatureX);
    yDistance = Math.abs(playerY - creatureY);
    totalDistance = (int) Math.sqrt(Math.pow(xDistance, 2) + Math.pow(yDistance, 2));

    if (totalDistance <= SHOOTING_RANGE) {
    String ref = "null.jpg";
    //NEED TO CHANGE THIS TO 360 DEGREE SHOOTING
    int direction = (int) creature.getLastMovementDirection();
    if (direction == Entity.NORTH || direction == Entity.SOUTH) { ref = "verticalmissile.gif"; }
    else if (direction == Entity.WEST || direction == Entity.EAST) { ref = "horizontalmissile.gif"; }
    System.out.println(totalDistance + " creature in range of player, should shoot now");
    //CREATE A MISSLE OBJ IN THE LAST DIRECTION THE MONSTER WAS FACING.. NEEDS TO SWITCH TO 360 DEGREE VECTOR TO PLAYER
    currentMissileObj.add(new Missile(ref, creature.getX() + creature.getWidth() / 2, creature.getY() + creature.getHeight() / 2, direction));
    }
    }
    }
    Last edited by mszyndlar; October 15th, 2011 at 01:51 AM.


  2. #2
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    Default Re: Desperate Need of help

    i figured out that what i need is to use the CohenSutherland method to check if my ArrayList of obstacles touch a line, i just need some help with implementationn

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    Default Re: Desperate Need of help

    1. Use code tags to enclose your tag.
    2. Use some editor to format the code.
    3. Ask about the exact problem. Your problem should be precise, short and descriptive enough to give knowledge about, you are asking.

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